ALEXANDRIA, Va., June 12 -- United States Patent no. 12,296,443, issued on May 13, was assigned to Ingersoll-Rand Industrial U.S. Inc. (Davidson, N.C.).
"Battery powered impact wrench" was invented by Warren A Seith (Bethlehem, Pa.), Justin T. Chellew (Bethlehem, Pa.), Nicholas Garibaldi (Princeton, N.J.), Kevin M. Purdy (Westfield, N.J.), Mark T. McClung (Andover, N.J.) and Madan Kumar Mandal (Bangalore, India).
According to the abstract* released by the U.S. Patent & Trademark Office: "An impact wrench is provided with a battery to power the motor. The impact wrench provides improved portability since the impact wrench does not need to be connected to an electrical extension cord or a pneumatic hose. The output drive, motor, batteries a...